content/browser/renderer_host/p2p/socket_dispatcher_host.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "content/browser/renderer_host/p2p/socket_dispatcher_host.h"
   6
   7 #include "base/bind.h"
   8 #include "base/stl_util.h"
   9 #include "content/browser/renderer_host/p2p/socket_host.h"
  10 #include "content/common/p2p_messages.h"
  11 #include "content/public/browser/resource_context.h"
  12 #include "net/base/address_list.h"
  13 #include "net/base/completion_callback.h"
  14 #include "net/base/net_errors.h"
  15 #include "net/base/net_log.h"
  16 #include "net/base/sys_addrinfo.h"
  17 #include "net/dns/single_request_host_resolver.h"
  18 #include "net/url_request/url_request_context_getter.h"
  19
  20 using content::BrowserMessageFilter;
  21 using content::BrowserThread;
  22
  23 namespace content {
  24
  25 const size_t kMaximumPacketSize = 32768;
  26
  27 class P2PSocketDispatcherHost::DnsRequest {
  28  public:
  29   typedef base::Callback<void(const net::IPAddressList&)> DoneCallback;
  30
  31   DnsRequest(int32 request_id, net::HostResolver* host_resolver)
  32       : request_id_(request_id),
  33         resolver_(host_resolver) {
  34   }
  35
  36   void Resolve(const std::string& host_name,
  37                const DoneCallback& done_callback) {
  38     DCHECK(!done_callback.is_null());
  39
  40     host_name_ = host_name;
  41     done_callback_ = done_callback;
  42
  43     // Return an error if it's an empty string.
  44     if (host_name_.empty()) {
  45       net::IPAddressList address_list;
  46       done_callback_.Run(address_list);
  47       return;
  48     }
  49
  50     // Add period at the end to make sure that we only resolve
  51     // fully-qualified names.
  52     if (host_name_.at(host_name_.size() - 1) != '.')
  53       host_name_ = host_name_ + '.';
  54
  55     net::HostResolver::RequestInfo info(net::HostPortPair(host_name_, 0));
  56     int result = resolver_.Resolve(
  57         info,
  58         net::DEFAULT_PRIORITY,
  59         &addresses_,
  60         base::Bind(&P2PSocketDispatcherHost::DnsRequest::OnDone,
  61                    base::Unretained(this)),
  62         net::BoundNetLog());
  63     if (result != net::ERR_IO_PENDING)
  64       OnDone(result);
  65   }
  66
  67   int32 request_id() { return request_id_; }
  68
  69  private:
  70   void OnDone(int result) {
  71     net::IPAddressList list;
  72     if (result != net::OK) {
  73       LOG(ERROR) << "Failed to resolve address for " << host_name_
  74                  << ", errorcode: " << result;
  75       done_callback_.Run(list);
  76       return;
  77     }
  78
  79     DCHECK(!addresses_.empty());
  80     for (net::AddressList::iterator iter = addresses_.begin();
  81          iter != addresses_.end(); ++iter) {
  82       list.push_back(iter->address());
  83     }
  84     done_callback_.Run(list);
  85   }
  86
  87   int32 request_id_;
  88   net::AddressList addresses_;
  89
  90   std::string host_name_;
  91   net::SingleRequestHostResolver resolver_;
  92
  93   DoneCallback done_callback_;
  94 };
  95
  96 P2PSocketDispatcherHost::P2PSocketDispatcherHost(
  97     content::ResourceContext* resource_context,
  98     net::URLRequestContextGetter* url_context)
  99     : resource_context_(resource_context),
 100       url_context_(url_context),
 101       monitoring_networks_(false) {
 102 }
 103
 104 void P2PSocketDispatcherHost::OnChannelClosing() {
 105   // Since the IPC channel is gone, close pending connections.
 106   STLDeleteContainerPairSecondPointers(sockets_.begin(), sockets_.end());
 107   sockets_.clear();
 108
 109   STLDeleteContainerPointers(dns_requests_.begin(), dns_requests_.end());
 110   dns_requests_.clear();
 111
 112   if (monitoring_networks_) {
 113     net::NetworkChangeNotifier::RemoveIPAddressObserver(this);
 114     monitoring_networks_ = false;
 115   }
 116 }
 117
 118 void P2PSocketDispatcherHost::OnDestruct() const {
 119   BrowserThread::DeleteOnIOThread::Destruct(this);
 120 }
 121
 122 bool P2PSocketDispatcherHost::OnMessageReceived(const IPC::Message& message,
 123                                                 bool* message_was_ok) {
 124   bool handled = true;
 125   IPC_BEGIN_MESSAGE_MAP_EX(P2PSocketDispatcherHost, message, *message_was_ok)
 126     IPC_MESSAGE_HANDLER(P2PHostMsg_StartNetworkNotifications,
 127                         OnStartNetworkNotifications)
 128     IPC_MESSAGE_HANDLER(P2PHostMsg_StopNetworkNotifications,
 129                         OnStopNetworkNotifications)
 130     IPC_MESSAGE_HANDLER(P2PHostMsg_GetHostAddress, OnGetHostAddress)
 131     IPC_MESSAGE_HANDLER(P2PHostMsg_CreateSocket, OnCreateSocket)
 132     IPC_MESSAGE_HANDLER(P2PHostMsg_AcceptIncomingTcpConnection,
 133                         OnAcceptIncomingTcpConnection)
 134     IPC_MESSAGE_HANDLER(P2PHostMsg_Send, OnSend)
 135     IPC_MESSAGE_HANDLER(P2PHostMsg_DestroySocket, OnDestroySocket)
 136     IPC_MESSAGE_UNHANDLED(handled = false)
 137   IPC_END_MESSAGE_MAP_EX()
 138   return handled;
 139 }
 140
 141 void P2PSocketDispatcherHost::OnIPAddressChanged() {
 142   // Notify the renderer about changes to list of network interfaces.
 143   BrowserThread::PostTask(
 144       BrowserThread::FILE, FROM_HERE, base::Bind(
 145           &P2PSocketDispatcherHost::DoGetNetworkList, this));
 146 }
 147
 148 P2PSocketDispatcherHost::~P2PSocketDispatcherHost() {
 149   DCHECK(sockets_.empty());
 150   DCHECK(dns_requests_.empty());
 151
 152   if (monitoring_networks_)
 153     net::NetworkChangeNotifier::RemoveIPAddressObserver(this);
 154 }
 155
 156 P2PSocketHost* P2PSocketDispatcherHost::LookupSocket(int socket_id) {
 157   SocketsMap::iterator it = sockets_.find(socket_id);
 158   return (it == sockets_.end()) ? NULL : it->second;
 159 }
 160
 161 void P2PSocketDispatcherHost::OnStartNetworkNotifications(
 162     const IPC::Message& msg) {
 163   if (!monitoring_networks_) {
 164     net::NetworkChangeNotifier::AddIPAddressObserver(this);
 165     monitoring_networks_ = true;
 166   }
 167
 168   BrowserThread::PostTask(
 169       BrowserThread::FILE, FROM_HERE, base::Bind(
 170           &P2PSocketDispatcherHost::DoGetNetworkList, this));
 171 }
 172
 173 void P2PSocketDispatcherHost::OnStopNetworkNotifications(
 174     const IPC::Message& msg) {
 175   if (monitoring_networks_) {
 176     net::NetworkChangeNotifier::RemoveIPAddressObserver(this);
 177     monitoring_networks_ = false;
 178   }
 179 }
 180
 181 void P2PSocketDispatcherHost::OnGetHostAddress(const std::string& host_name,
 182                                                int32 request_id) {
 183   DnsRequest* request = new DnsRequest(request_id,
 184                                        resource_context_->GetHostResolver());
 185   dns_requests_.insert(request);
 186   request->Resolve(host_name, base::Bind(
 187       &P2PSocketDispatcherHost::OnAddressResolved,
 188       base::Unretained(this), request));
 189 }
 190
 191 void P2PSocketDispatcherHost::OnCreateSocket(
 192     P2PSocketType type, int socket_id,
 193     const net::IPEndPoint& local_address,
 194     const net::IPEndPoint& remote_address) {
 195   if (LookupSocket(socket_id)) {
 196     LOG(ERROR) << "Received P2PHostMsg_CreateSocket for socket "
 197         "that already exists.";
 198     return;
 199   }
 200
 201   scoped_ptr<P2PSocketHost> socket(P2PSocketHost::Create(
 202       this, socket_id, type, url_context_.get(), &throttler_));
 203
 204   if (!socket) {
 205     Send(new P2PMsg_OnError(socket_id));
 206     return;
 207   }
 208
 209   if (socket->Init(local_address, remote_address)) {
 210     sockets_[socket_id] = socket.release();
 211   }
 212 }
 213
 214 void P2PSocketDispatcherHost::OnAcceptIncomingTcpConnection(
 215     int listen_socket_id, const net::IPEndPoint& remote_address,
 216     int connected_socket_id) {
 217   P2PSocketHost* socket = LookupSocket(listen_socket_id);
 218   if (!socket) {
 219     LOG(ERROR) << "Received P2PHostMsg_AcceptIncomingTcpConnection "
 220         "for invalid socket_id.";
 221     return;
 222   }
 223   P2PSocketHost* accepted_connection =
 224       socket->AcceptIncomingTcpConnection(remote_address, connected_socket_id);
 225   if (accepted_connection) {
 226     sockets_[connected_socket_id] = accepted_connection;
 227   }
 228 }
 229
 230 void P2PSocketDispatcherHost::OnSend(int socket_id,
 231                                      const net::IPEndPoint& socket_address,
 232                                      const std::vector<char>& data,
 233                                      net::DiffServCodePoint dscp,
 234                                      uint64 packet_id) {
 235   P2PSocketHost* socket = LookupSocket(socket_id);
 236   if (!socket) {
 237     LOG(ERROR) << "Received P2PHostMsg_Send for invalid socket_id.";
 238     return;
 239   }
 240
 241   if (data.size() > kMaximumPacketSize) {
 242     LOG(ERROR) << "Received P2PHostMsg_Send with a packet that is too big: "
 243                << data.size();
 244     Send(new P2PMsg_OnError(socket_id));
 245     delete socket;
 246     sockets_.erase(socket_id);
 247     return;
 248   }
 249
 250   socket->Send(socket_address, data, dscp, packet_id);
 251 }
 252
 253 void P2PSocketDispatcherHost::OnDestroySocket(int socket_id) {
 254   SocketsMap::iterator it = sockets_.find(socket_id);
 255   if (it != sockets_.end()) {
 256     delete it->second;
 257     sockets_.erase(it);
 258   } else {
 259     LOG(ERROR) << "Received P2PHostMsg_DestroySocket for invalid socket_id.";
 260   }
 261 }
 262
 263 void P2PSocketDispatcherHost::DoGetNetworkList() {
 264   net::NetworkInterfaceList list;
 265   net::GetNetworkList(&list, net::EXCLUDE_HOST_SCOPE_VIRTUAL_INTERFACES);
 266   BrowserThread::PostTask(
 267       BrowserThread::IO, FROM_HERE, base::Bind(
 268           &P2PSocketDispatcherHost::SendNetworkList, this, list));
 269 }
 270
 271 void P2PSocketDispatcherHost::SendNetworkList(
 272     const net::NetworkInterfaceList& list) {
 273   Send(new P2PMsg_NetworkListChanged(list));
 274 }
 275
 276 void P2PSocketDispatcherHost::OnAddressResolved(
 277     DnsRequest* request,
 278     const net::IPAddressList& addresses) {
 279   Send(new P2PMsg_GetHostAddressResult(request->request_id(), addresses));
 280
 281   dns_requests_.erase(request);
 282   delete request;
 283 }
 284
 285 }  // namespace content